Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b9e393859da47d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 00:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0090c57debdd225843d7bc2622cb5107 SHA-1: 07b75e197d5d1d221c6584fea5a3cec67959b2b5 SHA-256: 69b9e393859da47d09240eb12c0911573ca0bf473abb83bebf65b896a0863b4b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress uploads and other disposable hosting, a common tactic for distributing malicious files. The document body is heavily obfuscated, but the presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic suggest a phishing attempt, likely to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fidelishospice.com/ckfinder/userfiles/files/sozemegunaganemuvarozirom.pdf In PDF document text
    • http://cristal-in.fr/userfiles/file/ziseralonewar.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e89ba94e661---40241503540.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160753e4c5f0a3---99523485896.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/kugur.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5e2942697---82078428920.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/67309982224.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/89878227114.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/59784798714.pdfIn PDF document text
    • http://capital96.com/userfiles/file/fewugum.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/93683787696.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/f6fc1ecc7212943e1f10d387b7bbcd21/jemezitopitujonuzonega.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/11585889509.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/77358782496.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/gikujaxedon.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/nomitumixugoveki.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fff15daf7---fitalekeb.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7d08bf61d5ec24ed9dd6e7a733fb2b72/zuwoxulomolaligudokodexe.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7fdf16d88---misusem.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af3c9098f11---88970851758.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f5b1e80bf84684592197b3ab0a58d9ee/fakadolefumijaxe.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/92462243362.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/46241407469.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161206b407c73d---vexelunewavinusadini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=install+wkhtmltopdf+ubuntu+server+16.04PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 19268 bytes
SHA-256: b172d5f23d0ab3546b6f9e1469513b55c51418da6fe563ce8ab7825ea4133ccf
font_02_sfnt_off000125a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A1 11592 bytes
SHA-256: 50184c6af65021d5ae9626c7880d7adfd2ac9bd822fad9e94ad517415b42467d

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